Isaac tan bunschoten



I. VAN .BUNSCHOTEN.

Lamp.v

No. 14,478. Patented March 18, 1856..

N, PETERS Pholu-Lilhu n hur, Washin ton. 04 C.

UNITED STATES PATENT OFFICE.

ISAAC VAN BUNSCHOTEN, OF NEW YORK, N. Y.

ARGAND LAMP FOR BURNING ROSIN-OIL.

Specification of Letters Patent No. 14,478 dated. March 18, 1856.

To all whom it may concern:

Be it known that I, ISAAC VAN BUN- SCHOTEN, of the city, county, andState of New York, have invented, made, and applied to use certain newand useful Improvements in Lamps for Burning Rosin-Oil or SimilarSubstances; and I do hereby declare a that the following is a full,clear, and exact description of the construction and operation of thesame, reference being had to the I annexed drawing, making part of thisspeci- 3 fication, wherein Figure 1, is a vertical section through thecenter of the lamp and Fig. 2, is a plan,j V

5 will also catch and return all overflow from at and below the line a,a, of Fig. 1.

Similar marks of reference denote corre- 1 I the wick tube 3, and returnthe same lnto spending parts.

The nature of my said invention consists n prnvidlng means which shallprevent a siegldeifcurrent or draft of air from causlng a 1533p to smokein consequence of said passing current, forming a partial vacuum andthereby withdrawing a portion of the air from the flame and causing itto smoke. I also make use of a glass cone rising above the flame, saidcone being within and a separate piece from the glass chimney; and myinvention also relates to a method of constructing the exterior wicktube so that heat from the flame shall not be conducted down to thematerial being burned, and also that the overflow shall be returned tothe lamp by means of a cup or sleeve surrounding said exterior wick tubeand the openings therein that are made use of to check the heat andprevent the same being 0011- ducted down the lamp.

1), b, is a reservoir of anysuitable char acter surrounding the parts ofthe burner and connected thereto by a pipe or pipes as usual.

1, is the supply screw cap.

2, is the cone to the burner either made separately or a continuation ofthe inner part of the reservoir 7).

3, is the exterior wick tube and 4, is the interior wick or air tube;these are joined together at their lower ends and receive the drip cup0, and screw wire 6 with its button 7 all as usual.

5, is the wick holder and wick.

Around the wick tube 3, I make openings 9, of sufficient size and numberto check and to a considerable extent prevent the heat passing down thesame to the material being burned. If these openings alone were used inmy lamp (as they have heretofore been in other lamps of a differentconstruction) the material being burned might catch fire through theopenings 9, and the overflow from the lamp at the top of the wick wouldalso pass down the wick tube. I therefore combine with the said openings9, the exterior sleeve or cylinder 8, which inclosing said openings andonly having a narrow mouth at the top will surround the wick tube andholes 9, and that sufficiently close to prevent the material beingburned from catching fire at the openings 9, and

the wick that would otherwise run down the lamp. 7

In burning rosin oil it is necessary that the glass chimney shouldcontract conically to at least the height of the button, and in makinguse of chimneys of this character great difficulty arises because theyare so near the flame and become so very hot that they will frequentlybreak, particularly when cooling after the light has been blown out orwhen exposed to any draft or wind. To obviate this difficulty I make useof a separate transparent or glass cone 6, within the chimney (Z, of aheight that rises above the button 7, and acts to compress the draftonto the flame in the required manner and said cone 6, being transparentdoes not intercept the light as is the case with metallic deflectors orcones and although this glass cone 6, becomes very hot, yet it is sosmall compared with the conical chimneys, that it will become uniformlyheated and expand and contract as a whole, and being within the chimneyd, is entirely protected from sudden drafts of cold air and thereforescarcely ever breaks, and when the lamps is blown out the cooling ofsaid glass cone is very gradual as the rest of the lamp cools.

The rush or draft of air horizontally past a rosin oil lamp is very aptto make the same smoke, because a partial vacuum is formed at the top ofthe chimney, and also by the air passing quickly by the draft openingsto the lamp, hence sufficient atmosphere is not supplied to the flame. Itherefore provide flanges or wings f, f, standing out around the wicktube between the drip cup 0, and reservoir 6, which wings as the airpasses in the direction of the arrows intercept a portion of said airand deflect the same in dilferent directions causing by said deflectionthe necessary currents of air to pass both up into the external draftcone 2, and down into the drip cup and center draft, and the rush of airpast these wings does not hinder the natural ascent of the air betweensuch of the wings as do not catch the said draft.

I am aware that the internal draft up the air tube has been regulated bycross plates at the lower end therefore I do not claim the wings of themanner in which I have applied them; but I am not aware that wings f, f,or their equivalents have ever before been placed in such a manneraround the wick tube that the air is compelled to pass with equal forceinto both internal and external draft, thereby insuring a uniform actionon said light, whereas in cases where the wings are applied to theinternal draft only, the action is not uniform and the light will not hesteady nor the combustion perfect. I do not claim a conical glasschimney or a conical end to a glass chimney as these are well known andin general use; neither do I claim a metallic cone, but I am not awareof any separate glass cone ever having before been made use of, similarto that set forth herein.

f in themselves irrespective What I claim and desire to secure byLetters Patent isl. Deflecting a portion of any passing. draft orcurrent of air up the exterior air tube by means of the wings f, f ortheir equivalents, to counteract the suction or partial vacuum producedat other portions of the lamp by said passing draft or current of air asspecified.

2. I claim the wings f f, or their equivalents applied around the Wicktube 3 to cause any sudden draft or current of air to be deflected withequal force up into the cone 2, and external draft and down into thedrip cup 0, and internal draft in the manner and for the purposesspecified.

3. I claim the separate transparent cone 6, within the chimney d, risingonly to about the height of the button 7, for the purposes and asspecified.

4. I claim the sleeve or cup 8, combined with the perforated wick tube,and inclosing said perforations in the manner and for the purposesspecified.

In witness whereof, I have hereunto set my signature this thirtieth dayof October,

ISAAC VAN BUNSGHOTEU. Witnesses:

LEMUEL W. SERRELL.

THOMAS Gr. HAROLD.

